# Relationship history for MSHA mine 3503304

Current hierarchy: **Phibbs Theodore D → Desert Rose Mining Inc → Pine Creek-Hensley**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Bonnanza Mining Company → Pine Creek-Hensley; 1988-03-01 to 1991-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Bonn Thomas S → Pine Creek-Hensley; 1988-03-01 to 1991-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Bonn Thomas S → Bonnanza Mining Company; 1988-03-01 to 1991-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Desert Rose Mining Inc → Pine Creek-Hensley; 1991-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Phibbs Theodore D → Pine Creek-Hensley; 1991-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Phibbs Theodore D → Desert Rose Mining Inc; 1991-07-10 to current/open; source msha-controller-operator-history